Stop mechanism for phonographs.



R. THOMAS.

STOP MECHANISM FOR PHONOGRAPHS.

APPLICATION FILED JUNE 4. mu.

1 298,26, Patented. Apr. 1, 1919.

m: NOR/us Psrsns 60., FHcI'0-LlTr-lr/.. wAsumamIv, n. c.

1 ing ord I a r l REINHOLD THOMAS, OF'CI-IIGAGO, ILLINOIS.

STOP MEGHANISM FOR PHONOGRAPHS.

Specification of Letters Patent.-

Original application filed March 15, 1917, Serial No. 154,910. Divided and this application filed J'uneiA,

1917. Serial No. 172,593. p

To all whom it may concern Be it known that I, REINHoLo THOMAS, a

citizen of the United States, residing at Chicago, in the county'of Cook and State of Illinois,

pre-determined point with respect to the playing, as at the conclusion thereof,usu-

ally, and automatically stopping the rotation oftherecord at such pre-determined point in the playing. It consists in the elements and features of construction shown and described, as indicated in the claims.

In the drawings Figure 1 is a side elevation of'a phonograph equipped with this invention, the record carrier being partly broken away andshown in section through the pivot of the brake trip latch on Fig. 2.

Fig. 2 is a plan view of the same, havthe sound conduit portion of the recand record carrier broken away for showing the mechanism in detail.

Fig. 3 is a detail plan view of the tripping mechanism shown in Fig. 2 with the .parts at different position.

Fig. 4 1s a section at the line, 44:, on Fig.1.

Fig. 5 is'a perspective view of a locking washer employed in a pivot joint.

'In the structure shown in the drawings, A represents the table or top of the cabinet on which the phonograph is mounted. B is the record carrier which may be understood as mounted (by. means not shown) for rotation about a vertical axis upon the cabinet top, A, and rotated by a motor (not shown) also supported upon the cabinet top below, the same. C represents the record upon the record carrier. D is a block mounted upon the cabinet top, A,-having a vertical socket toreceive the spindle, 1 of a pivot support, 1, on which the unitary structure comprising the sound conduit with the passed onto the spindle, 1

Patented Apr. 1, 1919.

amplifier as a'part'thereof, and the sound a box, is pivotally mounted for swinging to carry the sound box toward and from the record, said unitary structure including the pivot support being rotatable about the axis 1 cooperate in and with respect to the vertical swinging movement ofthe'sound conduit 1n carryln the sound box toward and from .60 of the splndle, 1", in the block, D, for carrythe recor which are in part the'subject matter ofxmy said application No. 154,910, being claimed therein, and not claimed or further described in this divisional application.

.FOr the purpose ofautomatically terminating the rotation of the record and stopping the horizontalswinging movement of the sound conduit and sound box over the record at the conclusion of the playing, the

following structure is provided :A trip" finger, 7, projecting as a lever arm from a hub or collar, 8, is mounted onthe pivot support, 1, so as to be rotatable relatively thereto about the same vertical axis, and is fri-ctionally engaged with said pivot supas to be rotated therewith as well port so be capable of rotating relatively as to thereto. Devices for such frictional pivotal mounting comprise the said hub or collar,

8, centrally apertured so as to bepassed onto and fit upon the spindle, 1 and pressed up toward the downwardly-facing shoulder of the head of the pivot support, 1, a fiber washer, 9, being preferably interposed between said hub, 8, and said shoulder of the head; a disk spring, 10, whichis centrally apertured and passed onto the spindle, 1., up' against the underside of the collar,.,8; acup housing, 11, centrally apertured and under sideof the spring disk, 10, and with its flange inclosing said disk, the washer,'.9, and the hub or collar, 8, except that said flange is notched at its upper edge to interup against the" engage said lever arm or trip finger, 7,

which extends off from vsaid hub or collar,

8, out through said notch. All the abovementioned parts'are held in place, pressed up toward the shoulder of the head of the pivot support, 1,103 means of a locking washer, 12, which has a radial notch, 12, leading into its central aperture which is dimensioned for engaging the inner-circumfel'ence in an annular groove, 1, formed in the spindle, 1 so that when said washer is passed into place in said groove, as seen in, Fig. jl, the parts are held in place the spri g disk, 1 is mpressed to proper tension for producing adequate frictional engagement of the hub or collar, 8, with the, pivo support, 1,. for the purpose hereinafter explained. T e locking Wash 12,.is preferably provided on ts lo er fa e with a recess, 12, around the central aperture, saidrecess having the nnreduoed dimeter of the spindle, 1201: the pivot s p port, 1, so that. the reaction of the spring, .10, locks the locking washer in position on therspindle, 1 Upon the upper side of the cabinet top, A, there is mounted a plate, 15, upon which there pivoted at 16, a trigger, .17, having a finger, 17*, which .exjt'endsout past the margin lof the record support ,under the same so as to project in the path of the trip finger, 7, as the latter swings with the pivot. support, 1, abontthe vertical axis of the latter. The trigger, 17, has a locking arm, 17*,provided with a locking tooth, 17, which engages a notch, 18?, in a flange,- 18, which projects from the pivot bearing of a brakedevice, 1,8,, which is ,pivotally mounted on said plate, 15, and adapted to swing thereahout to engage its brake terminal, 18, with a depending flange, B of the record carrier, B. A. spring, 20, reacting von the lever 17-", of the trigger tends to press the tooth,l7, against the edge of the flange, 18f, ready to engage the notch, 1,8 and said notch is positioned relatively to the brake. terminal, 1 for engagement with said tooth when the brake terminal is pressed against flange, B, for releasing the record --carrier.. A spring, 21, reacting uppn the brake member, 18, operates to swing the brake terminal against the flange 4; engage the record carrier. The brake member has an operating handle, 21", which progectsjheyond the margin of the record earner for .manipulation of the brake by the operator. 7 The anode of use and operation nf the brake and trip device described rs as hollows: Whena record is placed upon regard. carrier for playing, the sound 6D hex swung over :to position at which stylus is at the innermost or final course of the final groove ofthe record, that is, at the. point at. which the playing will he ended, and while it is in this ,posi- --tion, the trip finger, 7, is turned about the fingerwith said pivot support, adapted to spindle, 1, of the pivot support, 1, until the end ofthe is in contact with the trigger, 1'7 ,-the brake, of course, being at position for holding the record carrier at rest. The sound box being now swung to carrythe stylus to the position for commencing the playing, the brake will be released by swinging the brake handle, 21 to the dotted line position, Fig. 2, at which it will be locked by the engagement of the tooth, 17, and the notch, 18. As the playing proceeds to the end, the trip linger, 7, will be carried into contact with the; tangger, 17, and the frictional-engagent; 1en-t of said trip linger with the pivot support, 1, is sufii-cient to turn the trigger about pivot disengaging the tooth, 1'7, from the notch, lS and releasing the brake whose spring, 21, will immediately swing it into engagement with, the flange, B of the '85 record carrier, and halt the rotation of the latter.

.I claim p v, 1.1 In a phonograph, 'incombinationwith the; sound-b'oX-carrying memner, a pivot support therefor mounted for turning about a vertical axis; a trip finger mounted on said pivot support for turning "relatively thereto; means for frictional engagement ofsaid trip cause themto turn togetheror relatively to each other; a frictionfbrake for the record carrier; a trigger for look-in the lora'ke out of braking position, said trigger having a finger extending in the patho'lthe first 'flIlBIl- 1'00 tioned trip finger, and adapted upon encounter thereby to be moved for disengaging the trigger from the brake, and independent springs for actuating thejbrake and 15 e trigger, r05 2'. In combination with a'sound-boxecarrying member, a pivot support therefor-mounted for turning about a vertical axis; a trip finger pivotally mounted onsaid pivot sup port for tnrningthereon about the same axis; a cup-shaped housing rotataibly positioned on said ivot support having its flange notched or engaging said trip finger; a spring in said housing reacting betweenlthe web thereof and -the trip finger, the pivot support having a head provided witha shoulder against hlch the trip finger is crowded by the spring, and having agroove adjacent to the outer surface oi said wet o fthe "housing, and a radially-slotted locking washer adapted to be engaged in said groove.

8,. In combination with a'sound-hoxcarrying member, a pivot su port therefor moun ed for turning about a vertical a is; a trip finger pivotally mounted on said i g't up. port for turning t reon about thesame aid a cup-shaped housing rotatably positioned on said ,pivo't support having its flange notched for engaging said trip finger; .a spring in said housing reacting between the In testimony whereof have hereunto set my hand at Chicago, Illinois, this 23rd day of May, 1917.

REINHOLD THOMAS.

web thereof and the trip finger, the pivot support having a head provided jiwith a shoulder against which the trip finger is crowdedby' the spring and having eggroove adjacent to the outer surface of said-web of the housing, and a radially-slottedx-locking washer adapted to be engaged in said'groove,

copies of thin patent may be obtained forlnve cents each, by addressing the Commissioner of Patents v -washington, D. 0." 

